Convert Square Foot to Hectare
Convert square feet to hectares instantly. 1 square foot = 9.290304e-6 hectare — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Hectare to Square Foot converter for the reverse conversion.
Units explained
Square Foot
A square foot is an imperial unit of area equal to exactly 0.09290304 m². It is the dominant unit for real estate area measurement in the United States and is widely used in India for residential property listings.
Derived by squaring the foot. The foot was standardized to exactly 0.3048 m via the 1959 International Yard and Pound Agreement.
Square feet are the standard unit for US real estate floor area, HVAC capacity ratings (BTU per ft²), commercial leasing, and construction. In India, square feet is the dominant unit for residential property advertisements alongside traditional regional units.
Foot dates to ancient civilizations; modern exact value standardized in 1959.
Hectare
A hectare is a metric unit of area equal to 10,000 square meters, or one square hectometer. It is the most widely used metric unit for land measurement worldwide.
Defined as 100 ares, equal to one square hectometer. The name was introduced in 1795 in France as part of the metric system.
Hectares are the standard unit for agricultural land measurement worldwide except in the US (which uses acres). 1 hectare equals 2.47105 acres. In India, hectares are used in modern agricultural census and land records alongside traditional regional units.
Adopted in France in 1795; standardized internationally through the SI system.
Square Foot to Hectare conversion formula
The relationship between square feet and hectares:
To convert square feet to hectares, multiply the value in square feet by 9.290304e-6. To reverse, multiply hectares by 107639.1041670972.
How to use this converter
Type a value into the calculator. The result in hectares updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Hectare to Square Foot converter for the reverse direction.
Step-by-step: convert square feet to hectares
- Write down the value in square feet (ft²).
- Multiply that value by the factor 9.290304e-6.
- The product is the equivalent value in hectares (ha).
- To reverse, multiply the hectare value by 107639.1041670972.
Worked examples
Example 1 — Convert 1 ft² to ha:
1 × 9.290304e-6 = 9.290304e-6 ha
Example 2 — Convert 100 ft² to ha:
100 × 9.290304e-6 = 0.0009290304 ha
Real-world example — Architectural to geographic scale
A 100,000-square foot measurement equals one hectare. The five-order-of-magnitude scale change comes up in mapping work where architectural site plans must be related to road-network maps.
100000 ft² × 9.290304e-6 = 0.9290304 ha
Real-world example — Small to geographic-scale
100,000 square feet equals one hectare — a useful conversion when small-scale survey diagrams must be related to road-network distances on a different map.
100000 ft² × 9.290304e-6 = 0.9290304 ha
Square Foot to Hectare conversion table
Standard reference values for converting square feet to hectares:
| Square Foot [ft²] | Hectare [ha] |
|---|---|
| 0.01 | 9.290304e-8 |
| 0.1 | 9.290304e-7 |
| 1 | 9.290304e-6 |
| 2 | 1.858061e-5 |
| 3 | 2.787091e-5 |
| 4 | 3.716122e-5 |
| 5 | 4.645152e-5 |
| 10 | 9.290304e-5 |
| 20 | 0.0001858061 |
| 30 | 0.0002787091 |
| 40 | 0.0003716122 |
| 50 | 0.0004645152 |
| 100 | 0.0009290304 |
| 500 | 0.004645152 |
| 1000 | 0.009290304 |
Frequently asked questions
How many hectares is 1 square foot?
How do I convert square feet to hectares?
How do I convert hectares back to square feet?
How many hectares is 100 square feet?
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Metric / SI (16 units)
Imperial / US Customary (14 units)
US Survey (5 units)
Indian Subcontinent (16 units)
Other Regional (10 units)
Scientific / Physics (5 units)
Historical / Pre-metric European (6 units)
Sources & references
Conversion factor (1 ft² = 9.290304e-6 ha) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.